{"id":29743,"date":"2026-09-27T00:31:35","date_gmt":"2026-09-26T16:31:35","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-100663"},"modified":"2026-09-27T00:31:35","modified_gmt":"2026-09-26T16:31:35","slug":"cve-2026-100663","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-100663","title":{"rendered":"CVE-2026-100663 [HIGH] &#8211; Netty&#8217;s HTTP\/3 codec (io.netty:netty-codec-http3) from 4.2.2.Final through 4.2.17.Final do"},"content":{"rendered":"<p>Netty&#8217;s HTTP\/3 codec (io.netty:netty-codec-http3) from 4.2.2.Final through 4.2.17.Final does not special-case HTTP\/1 CONNECT authority-form request-targets when converting HTTP\/1 messages to HTTP\/3 in HttpConversionUtil.toHttp3Headers. The authority-form target (e.g., &#8220;CONNECT trusted.example:443&#8221;) is parsed as a URI, so its host is emitted as :scheme, :path is set to &#8220;\/&#8221;, and the HTTP\/1 Host header is used as :authority; if no Host header is present the CONNECT target is dropped. In a Netty-based HTTP\/1-to-HTTP\/3 proxy or gateway, a remote client can send a CONNECT request whose Host header names a different authority than the request-target, producing a malformed HTTP\/3 CONNECT whose tunnel :authority is attacker-controlled. This can bypass tunnel allow-lists, egress policy, backend selection, or audit controls that validate the HTTP\/1 CONNECT request-target before forwarding over HTTP\/3. The issue is fixed in 4.2.18.Final.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Netty&#8217;s HTTP\/3 codec (io.netty:netty-codec-http3) from 4.2.2.Final through 4.2.17.Final does not special-case HTTP\/1 CONNECT authority-form request-targets when converting HTTP\/1 messages to HTTP\/3 in<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-29743","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/29743","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=29743"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=29743"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=29743"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}